<template>
  <div>
      <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
        <!-- 添加角色区域 -->
        <el-row>
            <el-col>
                <el-button type='primary'>添加角色</el-button>
            </el-col>
        </el-row>
        <!-- 角色列表区域 -->
        <el-table :data='rolelist' border stripe>
            <!-- 展开列 -->
            <el-table-column type='expand'>
                <template slot-scope="scope">
                    <el-row :class="['bdbottom',i1===0?'bdtop':'','vcenter']" v-for="(item1,i1) in scope.row.children" :key='item1.id'>
                        <!-- 渲染一级权限 -->
                        <el-col :span='5'>
                           <el-tag closable @close='removeRightById(scope.row,item1.id)'> {{item1.authName}}</el-tag>
                           <i class="el-icon-caret-right"></i>
                        </el-col>
                        <!-- 渲染二级和三级权限 -->
                        <el-col :span='19'>
                            <!-- 通过for循环 嵌套渲染二级权限 -->
                            <el-row :class="[i2===0?'':'bdtop','vcenter']" v-for='(item2,i2) in item1.children' :key='item2.id'>
                                <el-col :span='6'>
                                    <el-tag type='success' closable @close='removeRightById(scope.row,item2.id)'>{{item2.authName}}</el-tag>
                                    <i class="el-icon-caret-right"></i>
                                </el-col>
                                 <el-col :span='18'>
                                     <el-tag type='warning' v-for="(item3,i3) in item2.children" :key="item3.id" closable @close='removeRightById(scope.row,item3.id)'>
                                         {{item3.authName}}
                                     </el-tag>
                                 </el-col>
                            </el-row>
                        </el-col>
                    </el-row>
                </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type='index'></el-table-column>
             <el-table-column label='角色名称' prop='roleName'></el-table-column>
             <el-table-column label='角色描述' prop='roleDesc'></el-table-column>
             <el-table-column label='操作' width='300px'>
                 <template slot-scope="scope">
                     <el-button type='primary' icon='el-icon-edit' size='mini'>编辑</el-button>
                     <el-button type='danger' icon='el-icon-delete' size='mini'>删除</el-button>
                     <el-button type='warning' icon='el-icon-setting' size='mini' @click="showSetRightDialog(scope.row)">分配权限</el-button>
                 </template>
             </el-table-column>
        </el-table>
    </el-card>

    <!-- 分配权限对话框 -->
            <el-dialog
            title="分配权限"
            :visible.sync="setRightDialogVisible"
            width="50%">
            <!-- 树形控件 -->
            <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key='id' default-expand-all :default-checked-keys='defKeys' ref="treeRef"></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
            </el-dialog>
  </div>
</template>

<script>
export default {
    data() {
        return {
            //所有角色列表数据
            rolelist:[],
            //控制分配权限对话框的显示与隐藏
            setRightDialogVisible:false,
            //所有权限的数据
            rightsList:[],
            //树形控件的属性绑定对象
            treeProps:{
                label:'authName',
                children:'children'
            },
            //默认选中的节点id值
            defKeys:[],
            //当前即将分配权限的id
            roleId:''
        }
    },
    created() {
        this.getRolesList()
    },
    methods: {
       async getRolesList(){
          const {data:res} = await this.$http.get('roles')
            if(res.meta.status!==200){
                return this.$message.error('获取角色信息失败！')
            }
            this.rolelist=res.data;
            console.log(this.rolelist)
        },
        //根据id杀出对应的权限
        async removeRightById(role,rightId){
            //弹框提示用户是否要删除
            const confirmResult =await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
            }).catch(err=>err)
            
            if(confirmResult!=='confirm'){
                return this.$message.info('取消了删除')
            }
            // console.log('确认了删除')
            const{data:res}= await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
            if(res.meta.status!==200){
                return this.$message.err('删除权限失败！')
            }
            this.$message.success('删除成功！')
            // this.getRolesList()
            role.children=res.data;
        },
        //展示权限对话框
        async showSetRightDialog(role){
            this.roleId=role.id
            console.log(role.id);
            //获取所以权限数据
            const{data:res}=await this.$http.get('rights/tree')
            if(res.meta.status!==200){
                return this.$message.error('获取权限数据失败!')
            }
            //获取到的权限数据，保存到data中
            this.rightsList=res.data;
            console.log(this.rightsList)
            this.setRightDialogVisible=true;

        },
        //通过递归的形式，获取角色下所有三级权限的id，并保存到defkeys数组中
        getLeafKeys(node,arr){
            //如果当前node节点不包括children属性，则是三级节点
            if(!node.children){
                return arr.push(node.id)
            }
            node.children.forEach(item => {
                return this.getLeafKeys(item,arr)
            });
        },
        //监听分配权限对话框的关闭事件
        setRightDialogClosed(){
            this.defKeys=[]
        },
        //点击为角色分配权限
        async allotRights(){
            const keys=[
                this.$refs.treeRef.getCheckedKeys(),
                this.$refs.treeRef.getHalfCheckedKeys()
            ]
            console.log(keys);
            const idStr=keys.join(',')
            const {data:res}=await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
            if(res.meta.status!==200){
                return this.$message.error('分配权限失败')
            }
            this.$message.success('分配权限成功！')
            this.getRolesList();
            this.setRightDialogVisible=false;
        }
    },
}
</script>

<style scoped>
.el-tag{
    margin: 7px;
}
.bdtop{
    border-top: 1px solid #eee;
}
.bdbottom{
 border-bottom: 1px solid #eee;
}
.vcenter{
    display: flex;
    align-items: center;
}
</style>